Wood-boring machine



(No Model.) y

J. M. NASH; WOOD BORING-MACHINE. No. 274,020. Patented Mar. 13,1883.

*3 N R s WITNESSES: INVENTORJ ATTORNEYS.

which a UNITED STAT- s JOHN M. NASH, OF HUDSON, WISCONSIN.

wooo-eoame MACHINE.

SPECIFICATION forming part of Letters Patent No. 274,020, dated March13, 1883,

I Application filed July 2 1, 1882. (No model.)

To all whom it may concern:

Be it known that I, JOHN- MILTON NASH, of Hudson, in the county of St.Oroix and State of Wisconsin, have invented a newand useful Improvementin Wood-Boring Machines, of which the following is a full, clear, andexact description, reference being had to the annexed drawings, formingpart of this specification.

The object of this invention is to provide a machine for boring by asingle operation a number of holes at different angles to each other,such as are required in chair-legs, 85c.

In the drawings, Figure 1 is a side elevation of the machine. Fig. 2 isa front viewof apart of the same, and Fig. 3 is a plan view of thetable. a

A represents a cast pedestal or support for the machine, having at itsupper end a ciirved arm, B, extending upward'and over the same.

To the upper end of the pedestal is pivoted a frame, 0, having slots Dnear its ends, and thumb-screws E, passingthrough the slots into thepedestal, by which the inclination of said frame may be adjusted asdesired. This frame is provided with ears F, to which is pivoted ahorizontal table, G, and the table is provided with a semicircularplate, H, having a segmental slot and a thumb-screw, I, passing throughthe slot into said frame, by which the lateral. inclination of the tablemay be adj usted as desired.

To the upper surface of the table are secured bearin gs J for themandrels K, which bearings are ad justably connected to the table bymeans of bolts passing through slots which are to be formed in thetable, as hereinafter described, whereby the mandrelsmay be adj ustedtoward or from each other. The rear ends of the mandrels are connectedto yokes L, which are provided with rods M, passingthrough slots whichare to be formed in a bar, N, and secured loosely therein by nuts onopposite sides of i the said bar, in order that said yokes may be movedtoward or from each other in the adjustment of the mandrels.

To the upper end of the arm B is pivoted a frame, 0 aving a segmentalslot through "TIb-SCIBW P, passes into said arm to hold said frame atanydesired angle of ini clination.

To ears on the frame 0 is pivoted a bracket,

vided with a slot and screw for adjusting itin any desired position.This bracket is provided with slots S, as shown in Fig. 2, by means of60 which bearings J are adj ustahly secured thereto in precisely themanner the bearings J are secured to the table G. In these hearings aresupported mandrels K, having yokes L, connected to a bar, N,corresponding in every particular with the bar N. With this constructionthe mandrels are adapted to be adjusted toward or from each other justas the mandrels K. The bar Nis supported in a slotted angle-lever, T,and the bar N is connected to a lever, U, while the levers T and U areconnected by rods V to a third lever, W, which is weighted at one endand connected at the other with a foot-lever, X. The levers T and X areslotted, as shown, in. order that the connecting-rods V may be adjustedto vary the stroke of said levers.

The mandrels, which are provided with boring-bits Y, are geared with thedrive-wheel Z by means of pulleys U on the mandrels and the belt V,passing over the pulleys W X Y. The pulley X is supported in a slottedbearing, Z, whereby the tension of the beltmay be kept at the requireddegree. With this construction the two sets of boring-hits may beadjusted at various angles to each other, and the bits ofveach set maybe adjusted laterally with respect to each other, while ,they alwaysremain parallel. By means of a single belt the two sets of bits arerotated, and they are forced into or withdrawn from the wood that isbeing bored by the treadleX and the weighted lever W, respectively.

The table G is providedwith an angular cross-bar, G, which is adjustablyscrewed to a bracket, afby means of a longitudinal slot, a, in the barand a bolt having its head adapted' to move in the slot, and the bracketis connected to the table by means of a segmental slot, 1), in thebracket and a bolt having its head adapted to move in a slot, b,in thetable. I) is-a stop; With this construction the piece of wood to bebored may be held in the angul ar bar G at any desired angle ofinclination.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. A wood-boring machine having two sets of boring-bits, which aresupported normally at right angles to each other and combined with meansfor adjusting each set at an angle with a vertical orahorizontal plane,and means for adjusting the bits of each set to or from each other,substantially as shown and described. V

2. The combination,with a suitable support and a series of mandrels, ofa frame pivoted to the support and adapted to be secured at any' desiredinclination with respect thereto, a sec- .ond part pivoted to the frame,with its pivots at right angles to the pivot of the frame, and

adapted to be secured at any desired inclina- 7 JOHN MILTON NASH.Witnesses:

M. A. FULTON, F. S. DURAND.

